What did I do now?

[feelyx]

I believe the only difference is the porsche coolant has a defoamer in it, that is why no water is recommended, as it will delute the defoamer. Without the defoamer, its just another coolant.

[blue2000s]

Originally Posted by feelyx

I believe the only difference is the porsche coolant has a defoamer in it, that is why no water is recommended, as it will delute the defoamer. Without the defoamer, its just another coolant.

Porsche uses Elf Glacelf Supra OAT coolant and rebadges it. It's meant to be mixed with distilled water like all other coolants.

It's incompatible with traditional coolants and will form a gel that will not flow and is difficult to clean out.

Dexcool coolants from Texaco are compatible. But I'm not making promises.

[feelyx]

Here is the prestone extended life MSDS.....
PRESTONE EXTENDED LIFE ANTIFREEZE MSDS

Here is the label on the porsche antifreeze....



looks pretty much compatible to me, though the prestone has less chemicals.
As long as your silicate free you should be ok, as siliates don't mix with OAT